We had to remove all previous twitter setups to activate the feature, so you may have noticed a 'lost twitter badge'. To re-set it up, just go to 'edit profile' and use the new 'sign in with twitter' button. Once you do, you can also opt-in (it's opt-out by default!) to automatically tweet when you do stuff on the site, like mark anime or add recommendations. If you just 'sign in' without opting in to any settings, it'll be just like before, and your feed will once again show on your profile homepage :)

What is anime-planet?

Founded in 2001 as the first anime & manga recommendation database.
Create lists for what you've seen & read, watch over 30,000 legal streaming videos online via
Crunchyroll, Hulu & Viki, and meet other anime fans just like you.